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Daca x=5 si a+b=13, calculati: (4*a+4*b-2*x)*(2*a+2*b+x)=

Răspuns :

x=5
a+b=13
(4*a+4*b-2*x)*(2*a+2*b+x)=
(4*13-2*5)*(2*13+5)=
(52-10)*(26+5)=
42*31=1302